Modified head for soap injector unit

ABSTRACT

Induction means for use in combination with a positive displacement pump, the pump having a body with wall means and cover means defining a pumping chamber, a reciprocating piston disposed in a cylinder communicating with the chamber, a source of fluid under pressure being coupled to said pump through a supply conduit, inlet and outlet orifices communicating with said chamber and having inlet and outlet valves respectively for intermittent isolation of the chamber during the pumping strokes, the induction means being arranged in communication with the pumping chamber and being adapted to induce fluid flow into the pumping chamber for discharge through the positive displacement pump structure, the induction means including induction inlet means for coupling the chamber to a supply reservoir and communicating with said pumping chamber through a certain induction orifice, and an adjustable control means for controlling the flow of fluid from the supply reservoir to the induction orifice, and baffle means formed in the chamber and partially isolating the pumping cylinder and the induction orifice from the inlet orifice, the baffle means substantially impeding the flow of fluid from the source of fluid under pressure to the pumping cylinder so that upon each suction stroke of the piston, the pressure of the pumping chamber falls to a level below atmospheric.



1. In combination with a positive displacement pump having a body withwall means and cover means defining a pumping chamber, a reciprocatingpiston disposed in a cylinder communicating with said chamber, a sourceof fluid under pressure being coupled to said pump through a supplyconduit, inlet and outlet orifices communicating with said chamber andhaving inlet and outlet valve means respectively for intermittentisolation of said chamber from a supply conduit and a discharge conduitrespectively; a. induction means communicating with said pumping chamberfor inducing fluid flow into said pumping chamber for discharge throughsaid discharge conduit and including:
 1. induction inlet means couplinga supply reservoir of fluid to be introduced into said pumping chamberand communicating with said chamber through a certain induction orifice;and
 2. control valve means for controlling the flow of fluid from saidsupply reservoir to said induction orifice; b. baffle means formed alongthe inwardly directed surface of said cover means and being integraltherewith, and partially isolating said cylinder and said inductionorifice from said inlet orifice, said baffle means substantiallyimpeding the flow of fluid from said source of fluid under pressure tosaid cylinder so that upon each suction stroke of said piston, thepressure of said pumping chamber falls to a level below atmospheric. 2.control valve means for controlling the flow of fluid from said supplyreservoir to said induction orifice; b. baffle means formed in saidchamber and partially isolating said cylinder and said induction orificefrom said inlet orifice, said baffle means substantially impeding theflow of fluid from said source of fluid under pressure to said cylinderso that upon each suction stroke of said piston, the pressure of saidpumping chamber falls to a level below atmospheric.
 2. The combinationas defined in claim 1 being particularly characterized in that saidbaffle means comprises a pair of opposed abutments arranged in spacedapart relationship so as to define a flow channel therebetween. 2.control valve means for controlling the flow of fluid from said supplyreservoir to said induction orifice; b. baffle means formed along theinwardly directed surface of said cover means and being integraltherewith, and partially isolating said cylinder and said inductionorifice from said inlet orifice, said baffle means substantiallyimpeding the flow of fluid from said source of fluid under pressure tosaid cylinder so that upon each suction stroke of said piston, thepressure of said pumping chamber falls to a level below atmospheric. 3.In combination with a positive displacement pump having a body with wallmeans and cover means defining a pumping chamber, a reciprocating pistondisposed in a cylinder communicating with said chamber, a source offluid under substantial line pressure being coupled to said pump througha supply conduit, inlet and outlet orifices communicating with saidchamber and having inlet and outlet valve means respectively forintermittent isolation of said chamber from a supply conduit and adischarge conduit respectively; a. induction means communicating withsaid pumping chamber for inducing fluid flow into said pumping chamberfor discharge through said discharge conduit and including:
 4. Thecombination as defined in claim 1 being particularly characterized inthat said baffle means comprises a pair of opposed abutments arranged inspaced apart relationship so as to define a flow channel therebetween.5. The combination as set forth in claim 1 being particularlycharacterized in that the free flow area of said baffle means is lessthan the free flow area available in said inlet valve.
 6. ThecombiNation as defined in claim 3 being particularly characterized inthat said opposed abutments have generally arcuately rounded confrontingsurfaces forming a narrowed channel therebetween.
 7. The combination asdefined in claim 1 being particularly characterized in that saidinduction means includes: a. check valve means disposed in a secondorifice and in communication with said first orifice and arranged toopen upon the suction stroke and close upon the pressure stroke of saidreciprocating piston; and b. injection chamber means disposed betweensaid check valve means and said pumping chamber and having a thirdorifice in direct communication with said pressure chamber and havingbaffle means interposed between said third orifice and said injectionchamber for substantially isolating said injection chamber means fromsaid pumping chamber.